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Chapter 5

Chapter 5, Electrons in Atoms: vocab and key ideas

QuestionAnswer
What are energy levels? the fixed energies an electron can have.
What is a quantum of energy? the amount of energy required to move an electron from one energy level to another energy level.
The modern description of the electrons in atoms is known as what? the quantum mechanical model
What mathematical solution did the quantum mechanical model come from? the Scrodinger equation
The quantum mechanicalmodel determines what? the allowed energies an electron can have and how likely it is to find the electron in various locations around the nucleus of an atom.
What does the atomic orbital describe? the probability of finding an electron at various locations around the nucleus.
Orbitals describe where an electron is likely to be ______. found
What was John Dalton's theory of what an atom was/looked like? a tiny soild sphere
The ways in which electrons are arranged in various orbitals around the nuclei of atoms are called what? electron configuration
According the the ____ principle, electrons occupy the orbitals of lowest energy first. aufbau
What principle states that an atomic orbital may describe at most two electrons? Pauli exclusion principle
Define spin: a quantum mechanical property of electrons and may be thought of as clockwise or counterclockwise.
According to Hund's theory, electrons occupy what? orbitals of the same energy in a way that makes the number of electrons with the same spin direction as large as possible/
The amplitude of a wave is the wave's what? the wave's height from zero to the crest
What is the distance between the crets known as? the wavelenght (also represented by the Greek letter lambda)
The frequency, represented by the Geek letter nu, is the number of what? wave numbers to pass a given point per unit of time.
The SI unit of cycles per second is called what? hertz
______ includes: radio waves, light waves, infared waves,visible light, ulraviolet rays, x-rays and gamma rays. Electromagnetic radiation
When sunlight enters a prism, the different wavelenghts separate into a _______ of colors. spectrum
What are photons? light auantas
When is the atom at ground state? when the electron has its lowest possible energy
What does the Heinsenberg uncertainty principal state? it is impossible to know both the velocity and the position of a particle at the same time.
Created by: jmhschemistry